Adsorption and thermodesorption characteristics of benzene in nanoporous metal organic framework MOF-5

This study has been prepared and characterized a highly nanoporous metal organic framework (MOF-5). The nitrogen adsorption isotherm, gravimetric adsorption and thermodesorption method that utilize a quartz spring balance are used to examine the unusual adsorption behavior. Especially, the hybrid Langmuir–Sips isotherm equation is employed to correlate the experimental isotherm data. Moreover, the unusual adsorption behavior in MOF-5 is discussed in relation to its isosteric enthalpy of adsorption, adsorption energy distribution and desorption energy distribution calculated from benzene adsorption and thermodesorption measurements.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► We examine the unusual adsorption and thermodesorption behaviors of nanoporous MOF-5. ► The hybrid Langmuir-Sips isotherm equation describes the unusual adsorption isotherm of benzene satisfactorily. ► Adsorption and desorption energy distributions are attractive for examining the surface energetic heterogeneity of MOF-5.